<@U06RKAMK0UC> how do I pass a JSON payload to a t...
# ask-ai
a
@RunLLM how do I pass a JSON payload to a task?
r
To pass a JSON payload to a Flyte task, you can leverage Flyte's support for structured data types. Here's a step-by-step guide to achieve this: 1. Define the Task: Create a task that accepts a dictionary as an input. 2. Serialize the JSON Payload: Ensure the JSON payload is serialized correctly when passing it to the task. 3. Run the Task: Use Flyte's
pyflyte run
command to execute the task with the JSON payload. Here is an example: Step 1: Define the Task Define a task that accepts a dictionary input.
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from flytekit import task, workflow

@task
def process_data(input_data: dict) -> str:
    return f"Processed data: {input_data}"

@workflow
def my_workflow(input_data: dict) -> str:
    return process_data(input_data=input_data)
Step 2: Serialize the JSON Payload Prepare the JSON payload in a file, e.g.,
input.json
.
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{
  "key1": "value1",
  "key2": "value2"
}
Step 3: Run the Task Use the
pyflyte run
command to execute the workflow with the JSON payload.
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pyflyte run my_script.py my_workflow --input_data input.json
This approach ensures that the JSON payload is correctly passed and processed by the Flyte task. Would you like more detail? Sources: - Flyte 1.6 Release - Flyte Issue 3004 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
a
@RunLLM Do you have an example using the Java SDK?
r
To pass a JSON payload to a Flyte task using the Java SDK, you can utilize the FlyteAdminClient to create and execute tasks. Here is a step-by-step guide: 1. Set Up the Java Project: Include the necessary Flyte dependencies in your project. 2. Define the Task and Workflow: Create the task and workflow definitions in Python. 3. Use FlyteAdminClient in Java: Use the FlyteAdminClient to trigger the workflow with the JSON payload. Step 1: Set Up the Java Project Include the Flyte dependencies in your
pom.xml
or
build.gradle
file.
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<dependency>
    <groupId>org.flyte</groupId>
    <artifactId>flyteidl-protos</artifactId>
    <version>0.4.38</version>
</dependency>
Step 2: Define the Task and Workflow in Python Define a task that accepts a dictionary input and a workflow in Python.
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from flytekit import task, workflow

@task
def process_data(input_data: dict) -> str:
    return f"Processed data: {input_data}"

@workflow
def my_workflow(input_data: dict) -> str:
    return process_data(input_data=input_data)
Step 3: Use FlyteAdminClient in Java Use the FlyteAdminClient to trigger the workflow with the JSON payload.
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import org.flyte.jflyte.FlyteAdminClient;
import org.flyte.jflyte.api.ExecutionCreateRequest;
import org.flyte.jflyte.api.LiteralMap;
import org.flyte.jflyte.api.Literal;
import org.flyte.jflyte.api.Scalar;
import org.flyte.jflyte.api.Primitive;
import org.flyte.jflyte.api.LiteralType;
import org.flyte.jflyte.api.SimpleType;
import org.flyte.jflyte.api.WorkflowIdentifier;

public class FlyteExample {
    public static void main(String[] args) {
        FlyteAdminClient client = FlyteAdminClient.create("localhost:8089");

        // Create a JSON payload
        Map<String, Literal> inputMap = new HashMap<>();
        inputMap.put("input_data", Literal.ofScalar(Scalar.ofPrimitive(Primitive.ofString("{\"key1\":\"value1\",\"key2\":\"value2\"}"))));

        LiteralMap inputs = LiteralMap.builder().literals(inputMap).build();

        // Define the workflow identifier
        WorkflowIdentifier workflowId = WorkflowIdentifier.builder()
                .project("my_project")
                .domain("development")
                .name("my_workflow")
                .build();

        // Create the execution request
        ExecutionCreateRequest request = ExecutionCreateRequest.builder()
                .workflowId(workflowId)
                .inputs(inputs)
                .build();

        // Trigger the workflow execution
        client.createExecution(request);
    }
}
This example demonstrates how to define a task and workflow in Python, and then use the FlyteAdminClient in Java to trigger the workflow with a JSON payload. Would you like more detail? Sources: - Flyte Java SDK Example
- Flyte Java Client 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.